What do you do when a soldier refuses to listen to your directions?

No, don't write em up. Just mention to your crew that you have a "princess" in the squad who would like to have a blanket party. You of course will have nothing to do with it and when the "princess" shows up the following morning with her pretty shiner you just grin.

There's no need to write up anyone. Remove the glasses and then let the Pvt know that they will be receiving more personal instructions from you each day. You don't have to negotiate with subordinates. They are there to learn from you on how to become a better Soldier. I also like the crushing them beneath your feet too.

As a lower enlisted soldier. I believe highly in the old army and wish it was still like it was 40 years ago. Private snuffy wouldn't have had the chance to even wear sunglasses in formation. At my unit we don't do that. I also believe in individual PT as punishment. Screw your stress cards. You want to mouth off to an NCO, you can just low crawl across the parade field with your weapon in full battle rattle until I get tired. That's what the NCO should have done. That don't work? Then article 15 it is.

The soldier should immediately remove the sunglasses. Crushing them beneath his feet seems somewhat severe, unless it is the second time he was told to remove them. Spec 4 M US Army

I would not release the formation until he complies with your lawful order. This why he's pissing on his fellow soldiers and they'll whoop his butt for you. But I would also give him corrective punishment.

No need for Article 15. He wouldn't have any weekend and will be on every shit duties I could fine him.

Pretty simple Article 92 issue. How you handle is up to you. Never believed in wrecking an SRB if there's another way to gain someone's attention in order to comply with lawful orders and regulations. For me, I either excuse the idiot from MY formation and deal with him privately if he's an otherwise good troop, or I walk over and remove the glasses off his U.S. Government owned nasty face. Then I decide what to do after that. Never, and I mean NEVER surrender your authority to take charge of enforce standards, good order, and discipline!

In my day we would have dealt with such a soldier in ways that would get you courts marshaled today.

Standby to standby !! In front of first sarges office until someone asks why he is there.

AR 670-1 now has punitive action to support it. There's about 3 different things you can crush this Soldier for. Disregard SFC Boyd, an NCO is an NCO. Period. If you have a lawful order; crush them.